When using Teams on a HP Elitebook, it is often the case that be default the Mic quality seems rather poor.
This is likely to be due to a setting on your device.
To correct this,
Right-click on the 'Bang and Olufsen Audio' Icon in the Bottom left 'System Tray'
By right Clicking on this icon the following Menu will appear, here we wish to select 'Microphone Experience'
As you can see the options are:
'Only my voice' and
'Conference'
By switching this setting to Conference it will boost the range of the microphone allowing it to pick up your voice more clearly from further away.